In Samkhya , since atman (Purusa) is pure consciousness , which cannot be defined further, and Prakrti is responsible for the creation of the empirical world , Purusa is regarded as essentially inactive. But, while in Advaita , the multitude of souls (of course, the karmic chain of transmigration might hold together one and the same soul but they are supposed to be innumerable chains representing different souls) is only valid on the empirical, lower stage of reality.

Shankara quoted by N. V. Isaeva, in Shankara and Indian Philosophy, p.232